Improved beick-maohime



gradually curve inward again, so as to withdraw the plungers, which withdrawal will have been fully accom. plishcd by the time the point x3 shall have been reached, when the plungers will again rest on the pins c", preparatory to-again filling the moulds.

The conveyer or off-bearer E is an endless belt, passing around the two pulleys e and el, one of which may be made a driving-pulley to operate the device. This conveyor willbe placed at the bottom of the disk in such a position as to readily receive the bricks from the machine. A scraping-knife, F, is placed on the upper forward side of the disk, in such a position as to scrape off the face of the disk and moulds clean immediately after leaving the pug-mill. The scraper is held up to its work by thc wooden pin f, 'placed behind it for that purpose, the said pin being arranged to break and let the knife drop out, should it engage a stone orother hard or deleterious substance that might have passed through the mill. Set-screws (not shown) might be u sed to holdthe forward en'd of the knife down upon the disk.

A pressure-bed, G, is placed at the front side of the machine to receive the pressure of the followers c in forming the bricks. Aroundvthis pressure-bed is arranged a series of pressure-blocks, G1, connected together by an endlesschain, and arranged to revolve with the disk C in such a manner that each ofv the moulds will be covered by a pressure-block, while tl1e` clay within it is under pressure from the follower el. Tips, g, projecting from the cndsof the blocks G, overlap the sides ofthe disk, and are engaged by the pins, c", that project from the sides ofthe disk in such a manner as to take hold on the said lips and move the pressure-blocks forward in such a. manner'as to cause one of them to fall against each of the moulds in the said disk. rlhc face-plates, gl, may have their pressing-'faces constructed either straight or convex, as may `be'best suited to the construction of the bricks needed for different purposes. These plates may be adjustable by means of the setscrews g2, shown in the detail drawing. 4

The pins c, on which the followers are made to rest while the moulds are being filled, are to have square ends, both inside of the mould recess 'and outside of the disk, the outer'squares being used for the purpose of turning the said pins, so that the inner squares Shall be turned atwise or coruerwise to the follower-seat, thereby adjusting that seat to a distance more or less remote from the periphery of the disk, in order to make the mould more or less deep, as may be required for the manipulation of different qualities of clay.

Having described our invention, what we claim, is

The pug-mill B, when its bottom wings b'are formed concavely on the bottom, and combined with a disk,

C, and intermediate convex plate, as described and shown.

' n. oUtrLua,

G. C. SWALLOW.

Witnesses:

M. RANDOLPH, S. M. RANDOLPH. 

